Speed-measure.



Patented Aug. 8, i899.

C. DETLING.

SPEED MEASURE.

(Applcuton led Jan. 22, 1898.i

(No Model.)

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UNITED STATES PATENT OFFICE.

CARL OETLING, OF DRESDEN, GERMANY.

SPEED-MEASURE.

SPECIFICATIONforming part of Letters Patent No. 630,555, dated August 8,1899.

Application filed January 22, 1898. Serial No. 667,543. (No model.)

To all whom it may concern.-

Be it known that I, CARL OETLING, a subject of the Emperor of Germany,residing at the city of Dresden, in the Kingdom of Saxony, Germany,'haveinvented new andusefulApparatus for Regulating and Indicating Speed bythe Centrifugal Force of Liquids, (for which I have obtained LettersPatent in Austria, No. Liti/3,256, dated December 29, 1897; in Belgium,No. 132,794, dated December 29, 1897; in England, No. 30,674, datedDecember 28,1897, and inFrance, No. 273,479, dated December 24, 1897 ofwhich the following is a specication.

My invention relates to improvements in apparatus for indicating rotaryspeed; and it consists of chambers fixed to a rotating shaft having acavity. Each of the said chambers is divided into two compartments by adiaphragm or piston. One set of these compartments communicate with thecavity in the shaft and contain a heavy liquid, as mercury, and theother set of compartments beyond the diaphragm or piston contain a lightliquid, as water, alcohol, &c., and these com municate with anindicating device of any preferred make; and the invention furtherconsists of improvements hereinafter more fully described, and pointedout in the claims. The invention will be more fully understood taken inconnection with the accompanying drawings, forming part 0f thisapplication,

in which- Figure 1 is a sectional elevation of a rotary speed-indicatorhaving the chambers divided by diaphragms. Fig. 2 is a top view of thesame, and Fig. 3 is-asectional elevation of a rotary speed-indicatorhaving the chambers divided by pistons.

Referring now to the drawings for a further description of my invention,A is a driven shaft supported in bearings E and F and provided with acavity A at one end to contain a heavy liquid.

B are chambers communicating -with the cavity A of the shaft by thechannels or passages a. These chambers B are divided by a diaphragm L,Fig. 1, or by a piston L', Fig. 3, into two compartments Z) and b'. Thecompartments b communicate with the cavity A' of the shaft A 'and thecompartments bwith an indicator K by means of passages or'channels C anda tube H, attached to a cross-bar h, held to the bearing E by means ofbolts. This cross-bar h is fitted onto the nipple D of the covercontaining the channels C by means of a stuffing-box E', so that thetube I-I is :maintained stationary while the nipple D is rotating withthe shaft A.

The operation of the speed-indicator is as follows: The shaft A whoserotary speed is to be measured is rotated and with the same the chambersB. The heavy liquid, as mercury, 85e., is thrown or forced bycentrifugal force against the diaphragms L or pistons L and displacesthe light liquid on the other side of the diaphragms L or pistons L. Thedisplaced light liquid is led to an indicator K of any preferred kind;but for the sake of illustration I have shown oneof simple constructionin Fig. l, which consists of a receptacle lo, with diaphragm 7c. Apointer k2 is hinged to the base k3 and connected to the diaphragm la atabout its center. The free end extends onto a graduated scale, and asthe displaced light liquid bulges the diaphragm k upward the pointer k2is forced also upward and indicates the speed of the shaft. If thespeed'increases, the pointer moves farther upward, and when decreasingdownward, as willbe fully understood.

A great advantage of my improved speedindicator is that the indicatorproper can be set at a distance from the rotating shaft and the quantityof heavy liquid employed is reduced to a minimum.

'Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. A speed-indicator comprising a driven shaft, a cavity in the same,chambers arranged around said shaft, yielding partitions in saidchambers to form two compartments indicator proper, substantially as andfor the purposes set forth.

2. A speed-indicator comprising a driven shaft, a cavity in said shaft,chambers ar- IOO ranged around said shaft, yielding partitions in saidchambers to form two compartments in each of the chambers, passages fromthe cavity in the shaft to one of the two compartments of each chamber,passages from the other of the two compartments to a common point, anipple at said point and rotating with the said shaft and chambers, across-bar secured to a bearing of the shaft, a stuffing-box between saidcross-bar and said nipple and 1o an indicator proper, substantially asand for the purposes set forth.

Signed at Dresden, Germany, this 5th day of January, 1898.

CARL OETLING.

Witnesses z HERNANDO DE Soro, PAUL ARRAS.

